A grouphead (or group head) is the receiver for the removable portafilter (or group handle). A typical consumer espresso machine normally has only one grouphead, while popular professional machines, such as those used at commercial coffee shops, can contain anywhere from one to seven. During the process of extracting a shot of espresso, hot water is forced through the grouphead under pressure. The grouphead contains many holes (the shower) that attempt to distribute the pressurised water evenly over the surface of the grinds in the portafilter basket and thereby achieve an even cross sectional flow.
The first machine for making espresso was built and patented by Angelo Moriondo of Turin, Italy, who demonstrated a working example at the Turin General Exposition of 1884. He was granted patent no. 33/256 dated 16 May 1884 (according to the "Bollettino delle privative industriali del Regno d'Italia", 2nd Series, Volume 15, Year 1884, pages 635 – 655). A certificate of industrial title was awarded to Mr. Moriondo Angelo, of Turin, for an invention called "New steam machinery for the economic and instantaneous confection of coffee beverage, method 'A. Moriondo', Plate CXL".
This machine is extremely consistent and it brews an excellent espresso or cup of coffee. It also looks like Darth Vader manifested as a coffee machine: it's sleek and black and is definitely what our coffee makers will look like when we're all living on the moon. If your kitchen aesthetic is Space Chic, this machine is for you. It takes the joy and skill out of brewing your own espresso, but it works extremely well and is great for making an almost cafe-quality cup of coffee at home in no time and with very little effort.
Wake up to a perfect cup of coffee with Bunn’s newly designed 10-Cup HB Heat N' Brew Programmable Coffee Maker. For over 60 years Bunn has consistently and reliably brewed great tasting coffee for millions of people in their favorite restaurants and cafes. You can count on the brewing experts at Bunn to help you make the same great tasting coffee at home for your family, friends or just for you. This coffee maker features a digital clock with a programmable brew start time. Heat N’ Brew...
For many of us, the daily grind can't begin until we've had that first cup of piping hot coffee—so the right brewer is at the top of the list. The most basic coffee makers make at least a decent cup, but a little more money buys conveniences such as programmability, a thermal carafe to keep coffee hot longer, settings that let you adjust brew strength, and more.